Caster.



No. 888,040. PATENTED MAY 19, 1908.

' E. SABO.

OASTER.

APPLICATION FILED 13110.11, 1907.

40 clearly illustrated in t e accompanying signed more EDMOND SABO, OF ROCHESTER, NEW YORK.

cAsrER.

Specification of Letters Patent. Application file t1 December 11,1907. Serial No. 406,044.

Patented May 19, 1908.

To all whom it may concern:

Be it known that 1,. EDMOND Sum, of Rochester, in the county of Monroe and State of New York, have invented a new and useful Improvement in Casters, which improvement is fully set forth in the following s ecification and shown in the accompanying awings. This invention relates to certain new and useful improvements in casters for furniture, and it has for its objects among others to provide a sim 1e and cheap yet durable and eflicient ba -bearing caster which, while de- 1particularl for iron bedstea'ds,

may beequa y'applica le for use in connection with the wooden legs of beds, chairs and other devices.

The invention embodies, in its broadest sense, a plate carryin a plurality of balls designed to rest upon t e ody ortion .of the frame carryin the stern sai plate being pierced centra yand rovided with an upward tubular portion aving elastic extensions designed to spring into a shallow circular groove in the stem of the caster. When designed for use in connection with hollow metal members, the said plate is provided with spring portions ada ted'to enga e and pressoutward against is e inner suri ace of the said tubular member and serving to hold the caster coaxially to place therein, yet a'l lowing it to turn freely.

The invention is capablaof embodiment in a variety of forms, some of which onlyIhave chosen to show in the present instance:

Other objects and advantages of the in-,

vention will hereinafter appear and the novel features thereof will be particularly pointed out in the appended claims.

The invention in its referred forms is drawings which, with the numerals of reference marked thereon, form a part of this specification, and in which F' re 1 is a view of a portion of a metal mem er shown partlyin section with a portion' broken away, with my improved caster in (position therein. Fig. 2 shows the lower on of a wooden member in section with-the caster in position. Fi .3 is a top plan of the ball-bearing plate wit its tubular member and spring portions. Fig. 4 is a substantially central vertical section on the line 4-4 of 3. is a centralvertical section, with parts in elevation, of aslightly modified form. 6 is a bottom plan of a plate with three antifriction members. Fig. 7 is a similar view of a plate with four antifriction members. Fig. 8 is a substantially central vertical section through the ball-bearing member seen in Fig. 2.

Like numerals of reference indicate corresponding parts throughout the several views.

Referring to the drawings 1 designates a wheel or roller of any well known or approved form of construction, mounted to turn on the axle 2 held inside members 3 of the su port 4 for the stem 5. This stem is rigid wit and rises from this support and is rovided near its upper end with an annu ar groove 6 adapted to serve when used in connection with a wooden leg or member 7, and with an annular groove 8 at a point substantially midway of its length, as seen in Fig. 1, to serve when the device is used in connection with a tubular metal leg 9, within the bore 10 of which the stem andthe retaining devices are designed to be located, as seen clearly in ln the form seen in Figs. 1, 3 and 4, 11 is a plate, shown as circular, from which rise the s ring portions 12, in this instance shown as t ee in number, see Fig. 3. These members 1.2 are of some hard or elastic material, preferably metal, having the inner members 13, the outer members 15 being of less length and inclined downwardly and outwardly from the bends 14, their outer surfaces pressing outwardly against the inner surface 16 of the tubular leg 9, serving to hold the caster coaxially to place therein. This plate 11 is secured by r1vets or suitable means 17 to a plate 18 and also to the late 19. These two plates 18 and 19 are e some suitable thin material as metal, the lowermost late being pierced and having the downwardly projectmg annular flanges 20 serving to hold the balls 21 against displacement yet allowing said balls to turn freely in the bearings formed by the downward bulging of the lower plate around said openings, as shown clearly in Fig. 4. These p ates 18 and-19 are provided with a central opening coincident with a central circular o emng in the plate 11, and rejecting upward y through the latter is a s ort tubular part22, which may beintegral or rigid with either of the plates18 or 19 as maybefou'nd most ex edient, and this tubular member 22 is formed at its up or end with the two diametrically opposite ly disposed extensions 23 which are designed to spring into the annular groove or channel 8 of the stem 5, as shown clearly in Fig. 1, thus allowing the stem to revolve freely but prer venting its accidental displacement. It may be removed by a quick sudden pull on the roller 01 its so porting part. portions of t 0 balls .21 rest and revolve as seen clearly in Fig. 1.

members is capable of various modifications. In Fig. 5 I have shown one of such modified forms of construction. In this form the supporting member com )rises a single plate 24- to the upper face of which the plate 1 1 and its net as illustrated in Fig. 3. This plate, howi ever, is of normal larger diameter and is folded upon itself, as shown at .25, forming the bottom member 26, corresponding to the her is pierced to receive the balls 27, the

opening being bulged orllanged, as shown at Fig. 4.

irm bearing in a central opening it and at its upper end formed with small elastic extensions 31 adapted to engage in the groove 8 the same as the extensions 23 of the It is evident that the number of balls may be varied. more. In Fig. 6 l have shown three, this being the number preferred when the device is to be used with a wooden leg, as seen in l ig. .2. in this form the plate 32 which corresponds to the plate 19 in the form shown in Fig. 1 has the bulged openings 33 for the balls 34, it being understood, however, that I may employ the form shown in Fig. 8, so far as relates to the supporting member, if preferred. in this form the spring members 12 are omitted and the tubular portion 35 is made somewhat longer, its upper end being I provided with the short elastic extensions 36 There may be three, four or which are adapted to be sprung into the annular groove or channel .6 at the upper end of the stem, serving the same function as in the construction shown in Fig. l, the tubular! portion 35, however, in this instance being i made a snug fit for thebore 37 of the leg and serving by frictional engagement with the i inner surface thereof, to hold the same i ssaoao against turning or displacement. 'Ihe balls bear upon the upper surface of the su porting l member 4 the same as in the form s own in I Fig. 1. The projecting Other modifications in detail may be resorted to without departing from the spirit of the invention or sacrificing any of its advantages. The support for the plate 11 and its spring i What is claimed as new is 1. In a caster, the combination with a stem having an annular groove, of a ball supporting member having atubular portion with elastic extensions to engage 111, said 1 groove and additional spring members for spring members is attached in the same mani holding the stem coaxially in place.

In a caster, a supporting member having parallel portions one of which is pierced and provided with flanges to receive balls, 3 and a tubular portion disposed centrally of lower plate 19 in l ig. 4, and this lower mcmsaid member and having yielding extensions 2 and a plate having spring portions rising therefrom and bent upon themselves. 28, for the same purpose as the bulge 20 in The short tubular portion 29 extends upwarthfrom and is rigid with the lower member, there being an annular cavity 30 in tli'e'upper member which is covercd'by the plate 11, the tubular member 29 having a in said plate 5 3. In a caster, a supporting member having parallel portions, one of which is piercedand provided with flanges to receive balls and a tubular portion dis osed centrally of said member and having yieldin extensions, and balls held by said flanges an protruding beneath the same. r

4. Ina caster, a member rovided with, halls and a tubular portion Wit inwardly exj tending yielding extensions, and spring memtubular portion 22, and for the same purpose.

hers having inner and outer members of different lengths rising from said member.

5. In a caster, a supporting member composed of parallel portions with balls held therebetween, spring members rising therefrom, and a tubular portion disposed axially of said member and having elastic extensions at its upper end, the said extensions being independent of said spring members.

6. In a caster, a member formed of parallel portions, the lower portion of which has flanged openings, a plate secured to the upper portion and havmgspring members and a central tubular portion with yieldin extensions at its upper end, and balls he d in said flanged openings and protruding beyond said lower member.

In witness whereof, I have hereunto set my hand this 7th day of December, 1907, in the presence of two subscribing witnesses.

EDMOND SABO,

Witnesses:

\Enos B. Wnrrmonn,

A. Novosnr. 

